<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>列表排序</title>
  <!-- 引入Vue -->
  <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
  <!-- 准备好一个容器 -->
  <div id="root">

    <h2>人员列表</h2>
    <input type="text" placeholder="请输入名字" v-model="keyWord">
    <button @click="sortType =2">年龄升序</button>
    <button @click="sortType =1">年龄降序</button>
    <button @click="sortType =0">原顺序</button>
    <ul>
      <li v-for="(p,index) in filPersons" :key="p.id">
        {{p.name}}--{{p.age}}--{{p.sex}}
      </li>
    </ul>
  </div>
</body>

<script type="text/javascript">
  //用computed实现
  new Vue({
    el: '#root',
    data: {
      keyWord: '',
      sortType: 0, //0 原顺序 1降序 2升序
      persons: [
        { id: '001', name: '马冬梅', age: '18', sex: '女' },
        { id: '002', name: '周冬雨', age: '30', sex: '女' },
        { id: '003', name: '周杰伦', age: '23', sex: '男' },
        { id: '004', name: '温兆伦', age: '25', sex: '男' },
      ]
    },
    computed: {
      filPersons() {
        const arr = this.persons.filter((p) => {
          return p.name.indexOf(this.keyWord) !== -1
        })

        //判断一下是否需要排序
        if (this.sortType) {
          arr.sort((p1, p2) => {
            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age
          })
        }
        return arr
      }
    }
  })
</script>

</html>